. >> kevin would be screaming his head off. >>> coming up next, bouncing back from those baby bumps. >> how do they do it? kim kardashian's trainer brings us some expert advice. that's coming up next. >>> it's been just about a month since kim kardashian announced she was pregnant. >> the question on my mind, one of my, is how the rest of her body holding up? we're happy to hold up she does have a personal trainer, making sure she's looking just as fine as ever. abc's abby boudreau has more. >> reporter: the eternal question, how does she do it? hollywood moms shedding so much baby weight, so fast. >> take our arms and go like this, drop them down. >> reporter: trainer tracy anderson says the secret to getting your body back is keeping in shape during pregnancy. >> i used to have so many women coming to me after pregnancy, how can i get my body back? if i only had this during the pregnancy too. >> reporter: she should know. is how is it going? >> she's amazing. i was refreshed to hear her first, i'm pregnant and i want to do this right and healthy. >> reporter: tracy filmed her new d